… and here we are. It is normal, so to say. The keys have never been created. You need to open a terminal on your nanonote and do:
# cd /etc/ssh/
# ssh-keygen -t rsa -f ssh_host_rsa_key
# ssh-keygen -t dsa -f ssh_host_dsa_key
# /etc/init.d/ssh reload
and everything will be fine.